VOLCANO MADNESS: [Geology2] Volcanic activity worldwide 17 Aug 2014: Bárdarbunga, Mayon, Stromboli, Etna

Monday, August 18, 2014

[Geology2] Volcanic activity worldwide 17 Aug 2014: Bárdarbunga, Mayon, Stromboli, Etna

Volcanic activity worldwide 17 Aug 2014: Bárdarbunga, Mayon, Stromboli, Etna

Sunday Aug 17, 2014

The active lava flow on Stromboli's upper Sciara del Fuoco (INGV thermal webcam)

Current tremor signal (ECPNZ station, INGV Catania)

Earthquakes under Bárdabunga volcano (Icelandic Met Office)

Stromboli (Eolian Islands, Italy): No significant changes have occurred during the past days. The lava flow continues to be active from the vent at the base of the NE cone, but the effusion rate is slowly decreasing overall.

Etna (Sicily, Italy): Effusive / explosive activity from the New SE crater gradually declined and ceased over the weekend. The latest eruptive episode is now over.

Bárdarbunga (Iceland): An intense earthquake swarm started yesterday under Bárðarbunga volcano, located under the northwestern part of the Vatnajökull ice cap. It is continuing at the moment and accompanied by elevated harmonic tremor.
This might indicate a subglacial eruption at the volcano, but this needs yet to be confirmed.
The last eruption of Bárðarbunga volcano was in 1797, while another eruption in 1910 took place at neighboring Hamarinn volcano.

Mayon (Luzon Island): A small lava dome is present at the top of the volcano. During a field survey on 12 August, PHIVOLCS scientists observed a new lava dome, approx. 30-50 m high. It is not known when exactly the dome had grown, but it seems likely that it was relatively recently.
In the past 2 months, the volcano experienced weak and short phases of inflation, suggesting pulses of rising magma. In addition, sulfur dioxide emissions had been higher than normal during the past 2 weeks. However, no incandescence was observed during the past 4 months.

Volcano Activity Summary for 17 Aug 2014:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Bagana (Bougainville Island, Papua New Guinea): ash emissions, lava dome growth (updated 14 Aug 2014)
Barren Island (Indian Ocean): intermittent activity, likely strombolian-type and/or lava flows (updated 4 Feb 2014)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 7 Jul 2014)
Colima (Western Mexico): extrusion of lava flow from summit, intermittent explosions (updated 10 Apr 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 4 Aug 2014)
Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012)
Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013)
Fuego (Guatemala): strombolian explosions from summit crater, intermittent lava flows (updated 6 Aug 2014)
Ibu (Halmahera, Indonesia): growing lava dome, occasional ash emissions (updated 28 Jul 2014)
Kilauea (Hawai'i): new lava flow from vents on NE flank of Pu'u 'O'o (updated 13 Aug 2013)
Kuchinoerabu-jima (Ryukyu Islands): explosion on 3 Aug 2014 (updated 4 Aug 2014)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 25 Jul 2013)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 28 Aug 2013)
Marapi (Western Sumatra, Indonesia): sporadic explosions (updated 27 Mar 2014)
Nasu (Honshu)
Nishino-shima (Volcano Islands, Japan): lava effusion enlarging the new island (updated 28 Jul 2014)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 26 Feb 2014)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Reventador (Ecuador): ash emissions, explosions (updated 28 Jul 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 6 Aug 2014)
Sangeang Api (Indonesia): growing lava dome & lava flow (updated 7 Jul 2014)
Santiaguito (Guatemala): generation of hot lahars (updated 4 Aug 2014)
Semeru (East Java, Indonesia): growing lava dome & lava flow, sporadic explosions (updated 23 Jul 2014)
Shishaldin (United States, Aleutian Islands): small lava lake in summit crater (updated 14 Aug 2014)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 7 Jul 2014)
Sinabung (Sumatra, Indonesia): effusion of viscous lava, steaming, ash emissions (updated 15 Jul 2014)
Slamet (Central Java): strombolian explosions from central crater (updated 14 Aug 2014)
Stromboli (Eolian Islands, Italy): large lava flow on Sciara del Fuoco (updated 17 Aug 2014)
Suwanose-jima (Ryukyu Islands): strombolian activity in summit crater (updated 19 Jun 2014)
Tungurahua (Ecuador): new seismic unrest, ash emissions (updated 4 Aug 2014)
Ubinas (Peru): degassing, sporadic small explosions and ash venting (updated 6 Aug 2014)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)
Zhupanovsky (Kamchatka, Russia): intermittent ash emissions (updated 28 Jul 2014)

Eruption warning / minor activity:

Aso (Kyushu): occasional weak ash emissions (updated 23 Jul 2014)
Bárdarbunga (Iceland): earthquake swarm (updated 17 Aug 2014)
Bezymianny (Central Kamchatka Depression): steaming, weak seismic activity (updated 3 Jul 2014)
Chirpoi (Kurile Islands, Russia): hot spot visible on satellite imagery (updated 1 May 2014)
Etna (Sicily, Italy): strombolian explosions and lava flow effusion from NSEC (updated 19 Apr 2014)
Heard (Australia, Southern Indian Ocean): possibly lava lake in summit crater (updated 27 May 2014)
Karangetang (Siau Island, Sangihe Islands, Indonesia): lava extrusion at summit crater, strombolian activity, glowing avalanches (updated 28 Jul 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 3 Jul 2014)
Kavachi (Solomon Islands): no eruption since 2007 (updated 16 Jun 2014)
Kerinci (Sumatra): seismic unrest (updated 5 Jun 2013)
Krakatau (Sunda Strait, Indonesia): degassing (updated 31 Mar 2014)
Mayon (Luzon Island): slowly growing lava dome (updated 17 Aug 2014)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Nyamuragira (DRCongo): lava lake in summit crater (updated 4 Aug 2014)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Piton de la Fournaise (La Réunion): short-lived eruption during 21-22 June (updated 23 Jun 2014)
Poas (Costa Rica): occasional small phreatic explosions, intense degassing (updated 23 Jun 2014)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 4 Aug 2014)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): weak ash explosions (updated 26 Aug 2013)
Rasshua (Central Kuriles)
Raung (East Java): strombolian activity in summit crater (updated 5 Aug 2013)
Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012)
Sabancaya (Peru): seismic unrest, fumarolic activity (updated 14 Aug 2014)
Sacabaya (Northern Chile, Bolivia and Argentina)
San Cristobal (Nicaragua): possible ash emission on 11 April (updated 12 Apr 2014)
San Miguel (El Salvador): ash emissions, small explosions, increasing tremor (updated 23 Jul 2014)
Sangay (Ecuador): degassing (updated 24 May 2013)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 5 Aug 2013)